12.4 Evolution of Stars More Massive than the Sun
... It can be seen from this H-R diagram that stars more massive than the Sun follow very different paths when leaving the Main Sequence: ...
... It can be seen from this H-R diagram that stars more massive than the Sun follow very different paths when leaving the Main Sequence: ...
Light and shadow from distant worlds
... candidates and eliminate false-positives. Transit surveys have now discovered two planets comparable to Neptune in size20,21, and one super-Earth only 70% larger in radius than our own Earth22. The recent launch of NASA’s Kepler mission23 will greatly increase the number of rocky and/or icy transiti ...
... candidates and eliminate false-positives. Transit surveys have now discovered two planets comparable to Neptune in size20,21, and one super-Earth only 70% larger in radius than our own Earth22. The recent launch of NASA’s Kepler mission23 will greatly increase the number of rocky and/or icy transiti ...
SOLAR SYSTEM
... • The blue coloration is probably due to the presence of methane • Farthest planet ...
... • The blue coloration is probably due to the presence of methane • Farthest planet ...
Proxima b
... thermal energy to the dark side of the planet, which would be sheltered from dangerous UV radiation emitted by the red dwarf. Any people who went to colonise Proxima b might have to live on the dark side and create day and night artificially. In order to determine whether Proxima b is habitable (or ...
... thermal energy to the dark side of the planet, which would be sheltered from dangerous UV radiation emitted by the red dwarf. Any people who went to colonise Proxima b might have to live on the dark side and create day and night artificially. In order to determine whether Proxima b is habitable (or ...
Final Exam, Dec. 19, 2015 - Physics@Brock
... 4. What percentage of the known stars are the main sequence stars? (a) About 1%. (b) About 10%. (c) About 50%. (d) [None of the above.] 5. The spectroscopic parallax is a method of determining (a) a star’s chemical composition. (b) a star’s temperature. (c) a star’s distance from parallax angle. (d) ...
... 4. What percentage of the known stars are the main sequence stars? (a) About 1%. (b) About 10%. (c) About 50%. (d) [None of the above.] 5. The spectroscopic parallax is a method of determining (a) a star’s chemical composition. (b) a star’s temperature. (c) a star’s distance from parallax angle. (d) ...
Earth Science Quarter 1 Credit Recovery
... larger like carbon or nitrogen. Item on the “extra large” paper represent the heaviest elements found in our universe like iron. 4. Number your items based on their masses. The smallest mass should be item #1 and the heaviest item #12. 5. In Table 1 in the Data section of this lab, enter your item n ...
... larger like carbon or nitrogen. Item on the “extra large” paper represent the heaviest elements found in our universe like iron. 4. Number your items based on their masses. The smallest mass should be item #1 and the heaviest item #12. 5. In Table 1 in the Data section of this lab, enter your item n ...
Moro_Martin`s Talk - CIERA
... Cold KB-like disks are more common than AB-like disks. Individual collisional events may dominate disk properties. Inner gaps appear to be common in cold KB-like disks ...
... Cold KB-like disks are more common than AB-like disks. Individual collisional events may dominate disk properties. Inner gaps appear to be common in cold KB-like disks ...
Lecture8_v2 - Lick Observatory
... » looks impossible: too hot for ices, too little material for rock – Do they form outside frost line and migrate inwards? » planet forms in gas/dust disc around star » drag from remaining gas/dust causes it to spiral inwards » or scattering from other giant planets causes migration » why does it sto ...
... » looks impossible: too hot for ices, too little material for rock – Do they form outside frost line and migrate inwards? » planet forms in gas/dust disc around star » drag from remaining gas/dust causes it to spiral inwards » or scattering from other giant planets causes migration » why does it sto ...
Chapter 1 Our Place in the Universe
... in the local Solar neighborhood… • at typical relative speeds of more than 70,000 km/hr. • but stars are so far away that we cannot easily notice ...
... in the local Solar neighborhood… • at typical relative speeds of more than 70,000 km/hr. • but stars are so far away that we cannot easily notice ...
Earth Is Not the Center of the Universe
... Most of the celestial objects that are part of our solar system are constantly circling our sun. These circling paths are called orbits. All celestial objects have some amount of gravity, the attraction of one mass to another mass. Gravitational force is a measurement of the pull of gravity. Large ...
... Most of the celestial objects that are part of our solar system are constantly circling our sun. These circling paths are called orbits. All celestial objects have some amount of gravity, the attraction of one mass to another mass. Gravitational force is a measurement of the pull of gravity. Large ...
Photosynthetic Potential of Planets in 3:2 Spin Orbit
... the planet spends at apastron, and consequently reduces the total integrated flux received by the planet’s surface (Dressing et al 2010). Increasing the eccentricity to e=0.8 (bottom right) shifts the phase of the hotspots to 90 and 270 degrees, which now correspond to the points where the planet fa ...
... the planet spends at apastron, and consequently reduces the total integrated flux received by the planet’s surface (Dressing et al 2010). Increasing the eccentricity to e=0.8 (bottom right) shifts the phase of the hotspots to 90 and 270 degrees, which now correspond to the points where the planet fa ...
Lecture 3
... Earth is stationary in the geocentric model but moves around Sun in Sun-centered model. Retrograde motion is real (planets really go backward) in geocentric model but only apparent (planets don’t really turn around) in Suncentered model. Stellar parallax is expected in the Sun-centered model but not ...
... Earth is stationary in the geocentric model but moves around Sun in Sun-centered model. Retrograde motion is real (planets really go backward) in geocentric model but only apparent (planets don’t really turn around) in Suncentered model. Stellar parallax is expected in the Sun-centered model but not ...
School Powerpoint Presentation on Planet X 2011
... magnetic field • “…some fundamental physics is missing from our understanding." ...
... magnetic field • “…some fundamental physics is missing from our understanding." ...
`Daniel` – The Colonization of Tiamat
... focused on the Hubble Space Telescope, concluding that its maximum range was a meager 357.14 light years. Recent upgrades, including digital imaging, may have increased that distance 10-fold, but even 3571.4 light years is still far short of ever being able to see galaxies that are millions or billi ...
... focused on the Hubble Space Telescope, concluding that its maximum range was a meager 357.14 light years. Recent upgrades, including digital imaging, may have increased that distance 10-fold, but even 3571.4 light years is still far short of ever being able to see galaxies that are millions or billi ...
The origin, life, and death of stars
... molecular clouds of cosmic dust and gas When gravity causes intense heat and pressure in the core of the proto-star, it triggers fusion and a star is “born” The planets and other solar system objects are formed from ...
... molecular clouds of cosmic dust and gas When gravity causes intense heat and pressure in the core of the proto-star, it triggers fusion and a star is “born” The planets and other solar system objects are formed from ...
July - Westchester Amateur Astronomers
... stars are so numerous—as a class, they account for more than two-thirds of the stars in the galaxy— astronomers could reap a rich bounty of targets. In many ways, these stars represent a best-case scenario for planet hunting. They are close and in clear lines-of-sight, which generally makes viewing ...
... stars are so numerous—as a class, they account for more than two-thirds of the stars in the galaxy— astronomers could reap a rich bounty of targets. In many ways, these stars represent a best-case scenario for planet hunting. They are close and in clear lines-of-sight, which generally makes viewing ...
Notes
... The star will settle into a hydrostatic and thermal equilibrium, where cooling is balanced by nuclear energy generation and there is no time dependence of any state variables. ...
... The star will settle into a hydrostatic and thermal equilibrium, where cooling is balanced by nuclear energy generation and there is no time dependence of any state variables. ...
Neptune
... “Neptune: The Other Blue Planet in our Solar System” Space.com http://www.space.com/41neptune-the-other-blue-planet-in-our-solarsystem.html/ “Neptune” All About Astronomy ...
... “Neptune: The Other Blue Planet in our Solar System” Space.com http://www.space.com/41neptune-the-other-blue-planet-in-our-solarsystem.html/ “Neptune” All About Astronomy ...
PSE - Spring Final Exam Study Guide - 2016
... 1. Describe what happens at the following boundaries and what may result from each process: a. Divergent boundary b. Convergent boundary c. Transform boundary 2. Describe what happens at the three different types of convergent boundaries and give at least two examples of what geologic features may r ...
... 1. Describe what happens at the following boundaries and what may result from each process: a. Divergent boundary b. Convergent boundary c. Transform boundary 2. Describe what happens at the three different types of convergent boundaries and give at least two examples of what geologic features may r ...
Jeopardy 2015
... We are not in the center of our solar system, which is not in the center of the Milky Way and we are just one of a billion galaxies in the universe. Earth is made of common elements found throughout the universe. ...
... We are not in the center of our solar system, which is not in the center of the Milky Way and we are just one of a billion galaxies in the universe. Earth is made of common elements found throughout the universe. ...
Aug 2015 supplement - Hermanus Astronomy
... Milky Way. Since they are dim, they are hard to detect and are thus found almost exclusively in our cosmic neighbourhood. A particularly fascinating aspect of their existence is that near the Milky Way and at least two of our closest neighbours - the Andromeda and Centaurus A galaxies - these satell ...
... Milky Way. Since they are dim, they are hard to detect and are thus found almost exclusively in our cosmic neighbourhood. A particularly fascinating aspect of their existence is that near the Milky Way and at least two of our closest neighbours - the Andromeda and Centaurus A galaxies - these satell ...
The formation of stars and planets
... Typically this is reached at 10-6..10-5 M. From here on: gravitational influence of protoplanet determines random velocities, not the self-stirring of the planetesimals. ‘Oligarchic growth’. ...
... Typically this is reached at 10-6..10-5 M. From here on: gravitational influence of protoplanet determines random velocities, not the self-stirring of the planetesimals. ‘Oligarchic growth’. ...
Inquiry Activity - Ball State University
... The astronomers of old did not realize that it only appears as though everything rotates around the earth. What they did not consider was whether the Earth itself was rotating about its own axis. This was not obvious to them, and it is not obvious to us because it does not feel like the Earth is sp ...
... The astronomers of old did not realize that it only appears as though everything rotates around the earth. What they did not consider was whether the Earth itself was rotating about its own axis. This was not obvious to them, and it is not obvious to us because it does not feel like the Earth is sp ...
![Macmillan Natural and Social Science 1 [bold PB font]](http://s1.studyres.com/store/data/006552150_1-744c96fecd477a0d4dbe6606035b9c8f-300x300.png)
Macmillan Natural and Social Science 1 [bold PB font]
... Your child is about to start unit 7 of Natural and Social Science 2. The topic of this unit is The Sun. In this unit, your child will learn to ...
... Your child is about to start unit 7 of Natural and Social Science 2. The topic of this unit is The Sun. In this unit, your child will learn to ...
Planetary habitability
Planetary habitability is the measure of a planet's or a natural satellite's potential to develop and sustain life. Life may develop directly on a planet or satellite or be transferred to it from another body, a theoretical process known as panspermia. As the existence of life beyond Earth is unknown, planetary habitability is largely an extrapolation of conditions on Earth and the characteristics of the Sun and Solar System which appear favourable to life's flourishing—in particular those factors that have sustained complex, multicellular organisms and not just simpler, unicellular creatures. Research and theory in this regard is a component of planetary science and the emerging discipline of astrobiology.An absolute requirement for life is an energy source, and the notion of planetary habitability implies that many other geophysical, geochemical, and astrophysical criteria must be met before an astronomical body can support life. In its astrobiology roadmap, NASA has defined the principal habitability criteria as ""extended regions of liquid water, conditions favourable for the assembly of complex organic molecules, and energy sources to sustain metabolism.""In determining the habitability potential of a body, studies focus on its bulk composition, orbital properties, atmosphere, and potential chemical interactions. Stellar characteristics of importance include mass and luminosity, stable variability, and high metallicity. Rocky, terrestrial-type planets and moons with the potential for Earth-like chemistry are a primary focus of astrobiological research, although more speculative habitability theories occasionally examine alternative biochemistries and other types of astronomical bodies.The idea that planets beyond Earth might host life is an ancient one, though historically it was framed by philosophy as much as physical science. The late 20th century saw two breakthroughs in the field. The observation and robotic spacecraft exploration of other planets and moons within the Solar System has provided critical information on defining habitability criteria and allowed for substantial geophysical comparisons between the Earth and other bodies. The discovery of extrasolar planets, beginning in the early 1990s and accelerating thereafter, has provided further information for the study of possible extraterrestrial life. These findings confirm that the Sun is not unique among stars in hosting planets and expands the habitability research horizon beyond the Solar System.The chemistry of life may have begun shortly after the Big Bang, 13.8 billion years ago, during a habitable epoch when the Universe was only 10–17 million years old. According to the panspermia hypothesis, microscopic life—distributed by meteoroids, asteroids and other small Solar System bodies—may exist throughout the universe. Nonetheless, Earth is the only place in the universe known to harbor life. Estimates of habitable zones around other stars, along with the discovery of hundreds of extrasolar planets and new insights into the extreme habitats here on Earth, suggest that there may be many more habitable places in the universe than considered possible until very recently. On 4 November 2013, astronomers reported, based on Kepler space mission data, that there could be as many as 40 billion Earth-sized planets orbiting in the habitable zones of Sun-like stars and red dwarfs within the Milky Way. 11 billion of these estimated planets may be orbiting Sun-like stars. The nearest such planet may be 12 light-years away, according to the scientists.